ESRS for SMEs Explained: What the Standards Mean for Your Business

You have started seeing the acronym ESRS in supplier questionnaires, buyer onboarding forms, and procurement emails. You are fairly sure it is an EU thing. You are fairly sure it does not apply to you directly. But the questions keep arriving, and they clearly expect answers shaped by these standards.

Here is what ESRS actually is, how it connects to the regulations you have heard about, and what it means in practice for a UK SME that will never file an ESRS report but will spend real time responding to one.

What ESRS stands for and why it exists

ESRS -- European Sustainability Reporting Standards -- is the detailed rulebook that tells companies exactly what to disclose in their sustainability reports under the EU's Corporate Sustainability Reporting Directive (CSRD). If CSRD is the law that says "you must report," ESRS is the manual that says "here is precisely what you must report on, and how."

The standards were developed by EFRAG (European Financial Reporting Advisory Group) and adopted by the European Commission. The first set, known as ESRS Set 1, covers twelve topics grouped under three pillars:

Environment: Climate change, pollution, water and marine resources, biodiversity, resource use and the circular economy.
Social: Own workforce, workers in the value chain, affected communities, consumers and end-users.
Governance: Business conduct.

There are also two cross-cutting standards covering general requirements and general disclosures -- how a company should structure its reporting and what overarching information it needs to provide.

A large listed company reporting under ESRS will disclose hundreds of data points across these topics. That granularity is what makes ESRS valuable to investors and regulators. It is also what creates the ripple effect that reaches your inbox.

ESRS and CSRD -- which is which

People use ESRS and CSRD interchangeably. They should not. Here is the distinction:

CSRD is the directive -- the EU law that determines who must report and when.
ESRS is the set of standards -- the content framework that determines what those reports must contain.

When someone says "we need CSRD-compliant data from our supply chain," what they mean in practice is "we need data shaped by ESRS topics so we can complete our own report." The standards drive the questions. The directive drives the obligation.

This distinction matters because the ESRS topics are what you will see reflected in the questionnaires you receive. If you know the topics, you can anticipate the questions. The full breakdown of CSRD thresholds -- who reports directly and who does not -- is covered in the CSRD guide linked above.

Why SMEs encounter ESRS even without reporting obligations

The short version: because your customers do report, and their reports require supply chain data.

ESRS does not only ask companies to disclose their own operations. Several standards explicitly require "value chain" information. ESRS E1 (Climate Change), for example, requires reporting on Scope 3 greenhouse gas emissions -- the emissions generated upstream and downstream in a company's value chain. That includes emissions from their suppliers. That includes you.

ESRS S2 (Workers in the Value Chain) asks about labour practices and working conditions across the supply chain. ESRS G1 (Business Conduct) covers anti-corruption, payment practices, and supplier screening.

A large company cannot complete these disclosures from internal data alone. It needs information from its suppliers. The mechanism for collecting that information is a questionnaire.

If you supply goods or services to a company that reports under CSRD -- or to a company that supplies such a company -- you are in the data collection chain. The questions you receive are ESRS-shaped, even if nobody calls them that.

The ESRS topics most relevant to SMEs

Not every ESRS topic will appear in your questionnaires. In practice, three areas generate the majority of supplier data requests:

Climate and environment (ESRS E1, E2, E5)

Expect questions about your carbon footprint (Scope 1 and 2 emissions at minimum), energy consumption, waste management, and any environmental certifications you hold. If you operate in manufacturing, logistics, or construction, you will also see questions about pollution prevention and circular economy practices.

Workforce and social (ESRS S1, S2)

Questions about employee headcount, diversity metrics, health and safety incidents, training hours, and living wage status. If you use subcontractors or temporary workers, expect questions about how you manage their conditions too.

Business conduct and supply chain (ESRS G1)

Anti-bribery policies, payment terms, due diligence processes for your own suppliers, data protection practices, and whistleblowing mechanisms. This is the governance layer -- your buyer wants to know that working with you does not create regulatory or reputational risk.

If you have answered any ESG questionnaire in the past two years, you will recognise these categories. ESRS did not invent them. It standardised them.

LSME and VSME -- the proportionality tiers

EFRAG recognised that applying the full ESRS to smaller companies would be disproportionate. Two simplified frameworks were developed to address this:

LSME (Listed SME standard)

This is a mandatory standard for SMEs listed on EU-regulated markets. It is a significantly reduced version of the full ESRS, with fewer data points and simpler disclosure requirements. Most UK SMEs are not listed on EU markets, so LSME is unlikely to apply to you directly.

VSME (Voluntary SME standard)

This is the one that matters for supply chain purposes. The VSME -- Voluntary Sustainability Reporting Standard for non-listed SMEs -- was designed as the ceiling for what large companies should ask from their SME suppliers. It has three modules:

Basic module: Core qualitative disclosures -- your policies, practices, and general approach to sustainability.
Narrative PAT module: Policies, Actions, and Targets in more detail. What are you doing, what are you planning, and how do you measure progress.
Business Partners module: Quantitative metrics that a reporting company might need for its own ESRS disclosures -- emission figures, energy data, workforce statistics.

The February 2025 Omnibus package reinforced VSME's role by establishing that large reporting companies should not request more from SME suppliers than what the VSME covers. In practice, this means the questionnaires you receive should become more predictable and bounded. Our EFRAG VSME template guide breaks down each module and maps it to the questions you are likely to see.

Practical steps for UK SMEs

You are not going to file an ESRS report. But you are going to answer ESRS-shaped questions repeatedly, from multiple customers, on tightening deadlines. Here is how to prepare.

1. Map your existing data to ESRS topics

Take the ESG answers you already have and organise them by the three ESRS pillars: Environment, Social, Governance. The ESG readiness checker scores your preparedness across all four categories and highlights where the gaps are. Most SMEs have reasonable governance and social data but lack quantified environmental metrics.

2. Get your emissions baseline

Scope 1 and Scope 2 emissions are the single most requested data point in supply chain questionnaires. If you do not have a figure, start with a simple calculation based on your energy bills and fuel use. You do not need a consultant for a baseline estimate. You do need a number. Our carbon footprint estimator can give you a quick starting figure based on your energy and fuel data.

3. Build a reusable fact library

Every questionnaire you answer creates data that can be reused. The problem is that most SMEs answer each one from scratch, duplicating effort and introducing inconsistencies. A centralised fact library -- organised by ESRS topic -- lets you respond in hours rather than days. See when to move beyond spreadsheets for guidance on choosing the right approach for your volume.

To estimate how much time you are currently spending, try our ESG time calculator.

4. Standardise across your team

If multiple people in your organisation answer ESG questionnaires, they need to work from the same approved facts. Conflicting answers across different customer questionnaires create trust issues that are hard to undo.

5. Track and update annually

Certificates expire. Emission figures change year to year. Policies need review. Set a calendar reminder to refresh your fact library at least annually -- quarterly if you are in a high-scrutiny sector.

If you are new to responding to these questionnaires, our guide on how to respond to a supplier ESG questionnaire walks through the process step by step. For a deeper look at why structured questionnaire management matters and the real cost of getting it wrong, read our guide on why UK SMEs need ESG questionnaire management.

The competitive angle

ESRS compliance is framed as a burden. For SMEs who prepare properly, it is an advantage. Large companies prefer suppliers who can provide ESRS-aligned data quickly and consistently. If you can return a completed questionnaire in two days while your competitor takes three weeks, you are the easier supplier to work with. Procurement teams notice.

As VSME-aligned questionnaires become standard, the gap between prepared and unprepared SMEs will widen. The businesses that build their data infrastructure now will retain more contracts.

How AnswerVault helps

AnswerVault helps UK SMEs for exactly this situation. You will upload your ESG facts and evidence once, organised by the categories that map to ESRS topics. When a new questionnaire arrives, the suggestion engine will match questions to your existing approved answers. You review, adjust if needed, and export.

No ESRS expertise required. No consultants. Just your data, structured so you can reuse it every time a customer asks.

Try AnswerVault free to get started.

Sources

ESRS Set 1 — Commission Delegated Regulation (EU) 2023/2772, 31 July 2023. The twelve topic standards (E1–E5, S1–S4, G1) plus two cross-cutting standards (ESRS 1 and ESRS 2).
CSRD Directive — Directive (EU) 2022/2464 of the European Parliament and of the Council, 14 December 2022. Official Journal of the European Union, L 322.
EFRAG VSME Exposure Draft — EFRAG, Voluntary ESRS for non-listed SMEs — Exposure Draft, November 2023. Available at efrag.org.
EFRAG LSME Standard — EFRAG, Draft European Sustainability Reporting Standard for listed SMEs, 2024.
Omnibus Simplification Package — European Commission, COM(2025) 80 final. Reinforced VSME as the supply-chain data ceiling for SME suppliers.